You can try searching on fanfiction websites like Archive of Our Own (AO3). They usually have a wide range of fan - created works, including Batman x Copperhead fanfics. Just use the search bar and type in the relevant keywords.
A Batman x Atwoman fanfic could also be set in an alternate universe. In this universe, Gotham and Atwoman's city are somehow connected. Batman discovers a link between some strange occurrences in Gotham and events in Atwoman's city. He travels there to investigate and meets Atwoman. Together, they embark on a journey to uncover the mystery behind this connection. Along the way, they encounter different cultures and villains specific to her city, which makes for an interesting dynamic as they try to combine their skills to solve the problem.
A Batman x Atwoman fanfic could also focus on the emotional side of their relationship. Imagine Atwoman has a personal vendetta against a particular villain. Batman initially doesn't understand why she is so obsessed. But as he gets to know her story, he realizes that it's similar to his own quest for justice. This understanding brings them closer. They start to share their feelings and fears, and this newfound emotional bond helps them become even stronger allies when facing the challenges in their cities, whether it's fighting gangs or stopping mad scientists.
Another interesting one is 'Harley's Redemption'. This fanfic focuses on Harley's journey towards redemption with Batman's unexpected support. It delves deep into Harley's character, exploring her past traumas and how she tries to overcome them while forging a new relationship with Batman. It's quite a long and engaging read with some great character development.
One possible fanfic could be about a young boy who idolizes Batman but then discovers the allure of the Red X character. He might start to create his own version of a hero who combines the mystery of Red X with the justice - seeking of Batman. For example, in his daydreams, he imagines himself using Red X's gadgets to outwit villains in Gotham City, while still adhering to Batman's moral code.
The themes in 'Batman x Talia' fanfics are quite diverse. One that stands out is the theme of identity. Both Batman and Talia have complex identities, and their relationship forces them to re - evaluate who they are. For example, Talia might question her role as her father's daughter when in love with Batman. Another theme is the theme of trust. It's hard for them to fully trust each other given their different backgrounds and allegiances. And finally, the theme of fate. Some fanfics explore the idea that they are fated to be together despite all the obstacles in their path.
One great 'batman x catwoman fanfic' is 'The Heist'. It has an exciting plot where Catwoman plans a major heist and Batman is on her trail in a very different way than in the original comics. It's full of action and their flirtatious banter.
There's also 'The Ivy - Bat Alliance' fanfic. It starts with an unlikely alliance between Batman and Poison Ivy against a common enemy in Gotham. As they work together, their relationship blossoms in unexpected ways. The writer creates a vivid Gotham setting and the dialogue between the two characters is both sharp and full of unspoken emotions.
Well, in 'joker x batman fanfic', the theme of duality is quite prominent. Batman and the Joker are two sides of the same coin. They both exist in the dark world of Gotham, but they have completely different approaches. Also, the theme of redemption sometimes creeps in, especially in fanfics where the Joker might be on the verge of a change or Batman is trying to find a way to save his enemy from himself. And of course, the theme of the cat - and - mouse game, which is always exciting to read about.
Another fanfic concept is that there's a threat in Gotham that has a connection to the Moon Kingdom's past. Sailor Moon travels to Gotham to investigate. There, she meets Batman, who is initially skeptical of her magical powers. But as they start to work together, they realize that their skills are complementary. For example, Sailor Moon's ability to heal could be useful for Batman's injured allies, and Batman's detective skills could help Sailor Moon figure out the mystery behind the new threat.